Ohio State senior defensive lineman Kosta Karageorge hasn't been seen by anyone since going for a walk on Wednesday morning at 2 a.m., according to his family.

Karageorge, who also wrestles, told his roommate he was going for a walk and left early Wednesday morning, and as of 6 p.m. tonight, a family member told ABC News there were still no clues regarding his whereabouts. Here's more from the ABC report, which also includes information Karageorge's sister told the Columbus Dispatch:

Karageorge, a defensive tackle who is also on the Ohio State wrestling team, had no vehicle, wallet or ID when he left, the sister told the newspaper.

"He had some extenuating circumstances that night that lead us to believe he was upset," [Karagoerge's sister Sophia] said.

...

The reserve defensive lineman didn't show up for football practice Thursday morning, ABC affiliate WSYX-TV in Columbus reported. The Buckeyes are set to play Michigan on Saturday.

Karageorge, 22, is a white male, 6 feet, 3 inches tall, and weighs about 270 pounds. He was last seen wearing black sweatpants over jeans, black Timberland boots, and a black hoodie with FOC on it.

"He never misses practice," Sophia told the Dispatch. "I've seen him go to wrestling practice with a broken foot. I've seen him sick as a dog go to practice. He's always on schedule. He always has somewhere where he checks in."

She said that Karageorge has a history of sports-related concussions and the family is worried that might be disoriented because of one he suffered a month ago.